Plowshare



Jan. 13, 1953 w. J. BORST 2,625,093

- PLOWSHARE Filed June 4, 1948 FIG.3

III/II MIA INVENTOR.

WALTER d: BORST 4| FIG. 9

Patented Jan. 13, 1953 UNlTEfDi Walter-J. Borst Moline, Ill., assignor to Deere & Company-, MolinegIlL, a corporatiomofilllinois ApplicationiJune l, 1948,, Serial No. 31,114,;

5 Claims (CL: 97--125 e p ci l s of t e r sentin nti nmayr discarded after the same has wornbeyond its eflicient usefulness, rather than having the shares resharpened at a cost which greater thanthe cost of replacement; Further, 'it is=-a 'feature of this invention to'provide'a share of the disposable type which is adapted 'to -fitand operate efficiently on conventional plow bottoms.

Another important feature of the present-- invention is the provision ofagplowsh-are which j is made oftwo sections of flat stockwelded together at the proper angle; Having the blade" section of the =plowshare; as well as other parts;-made of-"fiat stock-lends itself tomachine fabrication.

in part by hand, canbe done--mainly--if notentirely by automatic 'machineryp Still further, another featureoi this-invention the provi-;

sion of a plowshare -inwhichthe landside-i-s 013- the samemstock thicknessias the blade but-is weldedto the latter in a positionspaced-laterallyinwardly of the landward-edge of theblade whereby the plowsh-are is adapted tofitconventional .plow bottoms which. ordinarily; receive plowshares having landside sections thickerithanl the, blade portionsthereof.

These and other objectscandadvantageslof the present invention will be apparent to .thoseskilled. intheart ,aftera consideration ofthe iollowing. detailed, description, taken in vconjunction with;

e acc mpa yin drawings,; n;which:.

Figure '1 is aplanviewer a plowsharein which the principles of the ,presentinvention :havebeen incorp ra ed; a

Figure 2 is a viewjtakeno substantially along the line 2,-2of Figure 1 looking directlylatthe plowshare landside alongia linelofasightreperp ndi ular e plane .of the ilandside;

Figure ,3 is a view taken; generally ialong. the;

linei3e.3uof Figure 2 looking directly at the 1un-. dersideof the plowshare, wpcrtionsnof the -latter.- en1- hefmei-the gl wheseheinghrcken awar- 5- at the renadeelf-the ina tivate-between Figure 4 isafragmentary'sectional :view taken along the'line 4'4 Qf-Figure 2;;

Figure 5 Ba view sim-ilar to Figure 4"showing amodified form ofthe present invention, wherein the landward edge "of the plowshare blade section-is sheared perpendicular to: the general plane of-the blade sect-ion;

Figure 6 i is an enlarged-;fragmentary perspective view showingthemanner-in-' which-the point of the-share blade =isbeve1ed Figural-is -a -viewsimi-lar=- to-Figure--6,-showing the -point of the-plow clippedoff+to-providea rounded end-at the point of the-share, instead of a beveled end-as shown in-Fig-urefi Figure 8 is :a fragmentary perspective view of the plowshare- -and :landside section, showing a modified form of: frog-engaging lug which is formed 1 integral with the-dug by tan -extrusion method;

Figure 9 is a .sect-ionah View. taken along the line 9-9 of Figure 8 and.

Figure-:10 .is a modified. form.v ofi the. "present invention.

Referring now to the drawings, theplowshare,

wh-ichwis indicateddn its: entirety by ;the.-..-reference numeral I of ...the.t present r invention =;is; shown (Figure :31" as lmounted ..on...the 1 frog. e2 formingta .part .ofza. :plowtbase indicated invits ntiretylby the reference;numeralisr The plow base-.3 maygbenoficonventionalconstructionihav: ing the f ogzZ -:pro vi.ded; with transverse. slot 14- f rmed. -.in the;lan lside=:.=wall fix-oaths; frog'-;2.i.t0: receive alug-.or;the; 1il;e carriedlaby the plow-.= hare w en, he,.;l t ter s; fixed to; the: frogii -.r

The plowshare EI comprisesaifiat hladerllt and; a generallvtrian lllar landside; section 1 I2 Both: of these parts .arer-made;\froma fiat. planar. stock which,;particu1arly;in thecase oizthexblade; section II, makes it possible tohaperformymany ifpnoti all fabricatiohnperations. by; machine. such has, for. vexample, :to-cr-machineogrindv and polish the upper ,orwouternface v. ofcvthe; bladewhereby sub-m. stantially all ;hand grinding: 1 and/orepolishing is. eliminated 'The twoipartsal I: and. t2'iareipreferiably of a the same thicknessiand,i:being. flat memhers, they may: easily: and quickly be. cut by shear ing.v from .fiat. plates. 1

The. landsidec I 2 is -secured to -the-b1ade-I I in such arposition to make amacute angleof =-approximately 60 degrees. However,:theupper-edgeor the --landside -I 2 is notnbeveled but: is :merelv sheared I at this point, as indicated at '-I 3 --in=-Figures--4-and -5. The two parts -I I and I2 -*are-pref-"- erably connected together by welding along fth e parts I! and i2. The landward edge of the share blade section II may be beveled, as indicated at I! in Figure 4, so as to provide an edge on the share blade that lies in a plane spaced outwardly or landwardly of the landside l2 and parallel with respect thereto. The amount of overhang at this point is in the nature of one-quarter inch but is suflicient to perform two functions. Firstly, the material of the share blade overhanging the landside l2 makes it possible for the farmer, if he should desire to do so, to keep a sharp edge at the landward end of the plowshare merely by grinding the edge I! (Figure 4) to bring the same into a plane which is parallel to the general plane of the landside l2.

Secondly, by having the blade overhang --the landside as shown in Figures 1-5, the landside staple or lug may be made stronger, as pointed out in detail below. The landside I2 is cut away, as by a notch 2| in Figure 2 or by a diagonal cut 2m in Figure 8, so as to provide a space s to receive the downward and landward portion 22 of the moldboard of the plow bottom. This landward and lowermost portion of the moldboard is customarily thicker than the blade section II, and therefore the additional space s is required so that the landside 12 would not interfere with the mounting of the share onto a plow bottom in proper relation with the moldboard.

It is not necessary to have the landward edge I! of the share blade beveled back, as shown in Figure 4, so as to bring the plane of said edge parallel to the plane of the landside [2. Under many, if not all, conditions it may be satisfactory or desirable to have the landward edge i'la (Fi ure 5) perpendicular to the outer face of the blade H. In other words, the edge Ila may be formed merely as a shear out without requiring any grinding off of the plowshare edge. Conversely, if the farmer should desire to have the share blade edge Ha sharper, he may grind the same back to the condition in which the edge is parallel to the plane of the landside l2 as shown in Figure 4.

Referring now to Figure 6, it will be seen that the underface of the plowshare blade H is beveled off, as shown at 24, to provide a sharpened leading or soil-separating edge 25. However, in order to avoid a relatively weak and easily deformed forward point (as shown in dotted lines in Figure 6), the point section of the blade 'H is beveled ofi along the plane indicated at 26 in Figure 6. A modified treatment of the point of the share blade is to clip the same off along a rounded line, as shown at 28 in FiFgure "I. In

both forms the point of the share blade is formed so as to readily enter the ground but has sufficient structural strength to maintain the desired suction and penetration. I a

Most plowshares are mounted on a frog of the type shown at 3 in Figure 3, namely, one having a slot 4 to receive a lug on the landward portion of the plowshare. According to the principles of the present invention, I provide such a lug in the form of a staple 3i having end sections 32 and 33 that are inserted in openings 34 and 35 formed in the landside [2. By having the latter section offset inwardly of the adjacentedge I! (or l'la) of the plate section II, there is sufficient space to form heads 31 on the end sections 32 and 33 of the staple, the heads being shaped somewhat like a button and producing a much,

more rigid and secure mounting or attachment 8 and 9 the riveted button-head type of staple attachment shown in Figure 3 is replaced by a lug 40 which is formed as an integral part of the landside. Preferably, the lug 40 is formed by an extrusion process, using male and female die elements to produce the desired shape. As shown in Figure 8, metal is caused to be displaced laterally inwardly of the landside section 12 so as to form the lug 40 at one side and a recess M at the other side, whereby sufficient metal is secured to form the lug an of adequate size but without causing undesirable deformation of the landside section [2. Some deformation takes place along the lower edge of the landside I2 to provide a sufficient quantity of metal for the lug 40, as indicated at 43. but this is not objectionable since the parts II and 12 are preferably secured together by a welding process along the straight upper edge 44 which is not displaced by the formation of the lug 40.

As also best shownin Figure 8, the landside i2 is preferably made so as to terminate at its forward end 41 a substantial distance at back of the point 26. Since for the distance d the thickness of the share blade remains constant, the share of the present invention-possesses the advantages of remaining fairly sharp and retaining its good penetration qualities as the share wears back, as at the point, whereas the conventional lap-forged share tends to sled runner which materially reduces the penetration of the share.

In some cases, as when the share is designed for use in particularly difiicult conditions, as where numerous stones and the like are encountered, it may be desirable to bring the point 41 of the landside down closer to the point 26 of the share. This construction is shown in Figure 10. However, this does not materially reduce the penetration of the share, even after the point is worn back, for the reason that the landside l2 does not flare out or widen at its point 41a, but is of constant thickness. Hence, there is, little tendency for the point to form sled runners." Further, to increase the penetration of shares of this type after they have worn back at the point, all the farmer has to do is grind off the forwardmost portions of the end 41a of the landside, as shown in dotted lines in Figure 10.

While I have shown and described above the preferred forms of the present invention, it is to be understood that my invention is notto be limited to the particular details shown and described above, but that, in fact, widely different means may be employed in the practice of the broader aspects of my invention.

What I claim, therefore, and desire to secure by Letters Patent is:

1. For use with plow bottoms adapted to receive conventional plowshares in which the landside sections thereof are thicker than the blade sec tions: areplacement plowshare comprising a sub stantially fiat blade having a diagonal edge at one end thereof, and a flat planar landside of substantially the same thickness as said blade and welded to the blade alongside said edge but spaced inwardly thereof so as to dispose the inner face of the landside substantially in a plane spacedinwardly of the plane of said edge, whereby the plowshare is adapted to fit bottoms constructed to receive conventional plowshares having landside sections thicker than the bla'desections, whereby when the replacement plowshare is fixed in position on the bottom, the landward edge of the replacement share lies substantially in the same alignment with;-,the moldboard as ,the conventional plowshare the amount-e5 overblade and-welded to the bladealongside saidedge but:spaced inwardlythereof so es-to dispose; the inner face of the landside inalplane spaced inwardly-ohthe plane of saidedge-a distance such that the plowshare is adaptedtofit plow bottoms constructed to receive conventional plowshares having landside sections thicken than the blade sections, whereby, when the replacement plowshare is fixed in position on the plow bottom, the inner edge of the replacement share lies substantially against that portion of the plow bottom against which the inner face of the thicker landside of a conventional plowshare is adapted to H bear, and the landward edge of the replacement share lies substantially in the same alignment with the moldboard of the plow bottom as the conventional plowshare, the amount of overhang of the blade over the landside at the landward portion of the plowshare being uniform for substantially the entire length of the landside.

3. For use with plow bottoms adapted to receive conventional plowshares in which the landside sections thereof are thicker than the blade sections: a replacement plowshare comprising a substantially fiat blade having a diagonal edge at the end thereof, and a substantially flat landside of substantially the same thickness as said blade and welded to the blade alongside said edge but spaced inwardly thereof so as to dispose the inner face of the landside in a plane spaced inwardly of the plane of said edge a distance such that the plowshare is adapted to fit plow bottoms constructed to receive conventional plowshares having landside sections thicker than the blade sections, whereby, when the replacement plowshare is fixed in position on the plow bottom, the inner edge of the replacement share lies substantially against that portion the plow bottom against which the inner face of the thicker landside of a conventional plowshare is adapted to bear, and the landward edge of the replacement share lies substantially in the same alignment with the moldboard of the plow bottom as the conventional plowshare, the amount of overhang of the blade over the landside at the landward portion of the plowshare being uniform for substantially the entire length of the landside, the latter having a pair of holes formed therein, and a frogeng'aging staple forming a lug on the inner side of said landside and having ends extending through said holes and protruding therefrom at the outer side of said landside, said protruding ends being riveted over to form button-like heads which fixedly lock the staple to the landside but are disposed wholly within the space between the vertical plane passing through the outer face of said landside and the vertical plane passing through the landside edge. of the replacement share and the portion of the moldboard aligned therewith, whereby the button-like heads do not contact the furrow wall formed by said landward edge and the aligned moldboard portion.

4.. R we slaw battens states; it res-sire conventional plowshar lin;,whichethealands de sections thereof are thicker than the blade sc: ti0ns-:;a replacementplowshare comprising a substantially fiat blade having a diagonal edge at one end thereof, and=a substantia lly flat landside of ub tan i ly the sam thickne s sa d blad and "fixed'to the blade alongside-,said; edge but spaced inwardly thereof so as to dispose the inner face of the landside in a'--planespaeed inwardly of the ,plane of said edge a distance such that the plowshareis; adapted to fit plow: bottoms-conslmucted toireceive conventional; plowshareshavingdandside sections thicker than-the bladeysections, whereby, when the replacement plowshare isfixed in-lposition on the plow, bottom, the:,-inner edge ofthe replacement sharerlies substantially againstthat portion of the plow==bottomagainst Whichthe inner face of the thicker landside of a conventional plowshare is adapted to bear and the landward edge of the replacement sha perlies substantially in the same alignment with the moldboard of the plow bottom as the conventional I plowshare, the amount of overhang of the blade over the landside at the landward portion of the plowshare being uniform for substantially the entire length of the landside, the landside of said replacement share being secured to said blade sec tion by a fillet weld, the fillet of which lies beneath the overhang of the blade over the landside but wholly inwardly of the vertical plane passing through the landward edge of the replacement share and the portion of the moldboard aligned therewith.

5. For use with plow bottoms adapted to receive conventional plowshares in which the landside sections thereof are thicker than the blade sections: a replacement plowshare comprising a substantially flat blade having a diagonal edge at the end thereof, and a, substantially flat landside of substantially the same thickness as said blade and welded to the blade alongside said edge but spaced inwardly thereof so as to dispose the inner face of the landside in a plane spaced inwardly of the plane of said edge a distance such that the plowshare is adapted to fit plow bottoms constructed to receive conventional plowshares having landside sections thicker than the blade sections, whereby, when the replacement plowshare is fixed in position on the plow bottom, the inner edge of the replacement share lies substantially against that portion of the plow bottom against which the inner face of the thicker landside of a conventional plowshare is adapted to bear, and the landward edge of the replacement share lies substantially in the same alignment with the moldboard of the plow bottom as the conventional plowshare, the amount of overhang of the blade over the landside at the landward portion of the plowshare being uniform for substantially the entire length of the landside, the latter having an opening formed therein, and a frog-engaging member forming a lug on the inner side of said landside and having an end extending through said aperture and protruding therefrom at the other side of said landside, said protruding end being riveted over to form a button-like head which fixedly locks said member to the landside but is disposed wholly within the space between the vertical plane passing through the outer face of said landside and the vertical plane passing through the landside edge of the replacement share and the portion of the moldboard aligned therewith, whereby the button-like said landward edge and thealigned moldboar portion.

WALTER J. BORST.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Hanson Sept. 19, 1882 Briggs Feb. 18, 1890 Clark July 4, 1889 Leave June 20, 1911 Peterson Oct. 15, 1912 Melvin May 23, 1916 Melvin June 17, 1919 McCarty Dec. 12, 1919 Bohmker Oct. 27, 1925 Coble July 20, 1926 Number Number Name Date Bernstein Feb. 5, 1935 Wilson Oct. 13, 1936 Tomlinson Aug. 17, 1937 Beckstrom Feb. 7, 1939 Chibnik Apr. 18, 1939 Condo Nov. 18, 1941 Altgelt Apr. 21, 1942 Hudson Apr. 12, 1949 FOREIGN PATENTS Country Date Australia Dec. 1, 1932 France Apr. 10, 1923 Australia July 30, 1931 Denmark June 26, 1922 Denmark Oct. 6, 1925 Sweden Sept, 8, 1942 France June 6, 1932 

